TY  - BOOK
ED  - Puerto Rico.
TI  - Graphs on health progress in Puerto Rico during the present century
PY  - 1960///
CY  - San Juan, P. R.
PB  - [Section of Biostatistics. Dept.of Preventine medicine... University of Puerto Rico]
KW  - Hygiene, Public
KW  - Puerto Rico
KW  - Local
N1  - Cover title : Health progress in Puerto Rico
ER  -